                :convention_id (str con_uuid)
                :persons []
                :preferred_slot_id nil
+               :preferred_day nil
                :event_count 1
                :event_type "single"}
               :status 200}

             :name "Foo"
             :persons [(str person_uuid)]
             :preferred_slot_id nil
             :event_count 1
             :event_type "single"}
            :status 200}

              :name "Foo"
              :convention_id con_uuid
              :preferred_slot_id nil
              :preferred_day nil
              :event_count 1
              :event_type 1}
             (first (kc/select db/events (kc/where {:id event_uuid})))))
